This article shows you various methods for determining the version of CentOS. Particularly when it comes to the configuration of software repositories or installation of any software, it is extremely important to get the right version of the software so that the solution is compatible with the operating system version. For troubleshooting, bug fixes, and many other reasons, you may need to know the version of the operating system. The second section is where we reverse proxy the request to the backend servers. This is unique to Apache, as other web servers that support WebSockets will automatically perform this task for you. The first section, where the rewrite module is used, must be done to convert it to the proper format for WebSockets. There are two important sections to configuration that you must understand. The following is an example of a virtual host that supports web sockets. Restart Apache Web Server to apply your changes.If you made any changes to the file, save them now.LoadModule proxy_wstunnel modules/mod_proxy_wstunnel.so LoadModule proxy_http_module modules/mod_proxy_http.so Verify that the following lines exist and are uncommented. All modules related to proxying are listed in this configuration file.Open the module configuration file for proxies.Enabling and disabling these modules is done by editing a configuration file. The prerequisite modules are already enabled by default on a CentOS 7 install of httpd. a2enmod proxy a2enmod proxy_http a2enmod proxy_wstunnel If you are running Ubuntu 16.04 or higher, run the following commands to enable the modules. In order to enable WebSocket reverse proxying, the Apache modules for handling such requests must be enabled. The goal of this tutorial is to explain how to correctly configure Apache to reverse proxy WebSockets, using RewriteEngine and ProxyPass. Performing a simple Google search of WebSocket problems with Apache, we can easily draw that conclusion. Handling WebSockets in Apache Web Server 2.4 isn’t as straight forward as with other web servers. This paved the way for event-driven responses, such as notifying a user of new content without refreshing the page. WebSockets were introduced to open two-way interactive communication sessions, between a client and a server. In this tutorial, you will learn how to configure Apache Web Server 2.4 to reverse proxy WebSockets.
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